New ‘Old Stock’ Martindale Positive Pressure Powered Respirator. MK5. The set is complete except for the battery which would not be too difficult to adapt a power source to suit. The unit has never been used and comes with 100 Pre Filters and 15 gas filters all sealed and boxed, together with connecting hoses to the unused face mask plus 1 additional spare hose. The unit is designed to fit around the waist using the supplied belt and feed the positive action face mask. Please not this is the positive face mask version so, depending on use, goggles (not included) may be required. The unit is not in its original box but will be securely packaged. An absolute bargain at a greatly reduced price if a new respirator was being sought.